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A series of tests have been made using two spectrographic electrode materials to evaluate differences in response to the dc arc over a wide variation in current (6 to 38 amp). Carbon anodes burn at a faster rate than graphite, but carbon is overloaded at a lower current density. At
high currents both materials approach the same burning rate. The burning rates are dependent on the arc current, the cross sectional area, and the properties of the grade used. Any one of the three variables can be partially compensated for by an equivalent change in the other two. The effects
of burning rates on analytical results are discussed.
U. S. Army Electronic Research and Development Laboratory, Fort Monmouth, New Jersey
Publication date: May 1, 1963
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The Society publishes the internationally recognized, peer reviewed journal, Applied Spectroscopy, which is available both in print and online. Subscriptions are included with membership or can be purchased by institutional or corporate organizations. Abstracts may be viewed free of charge. Previously published as Bulletin (Society for Applied Spectroscopy)